When the surface of a metal is exposed to blue light, electrons are emitted. If the intensity of the blue light is increased (so the light i

Question

When the surface of a metal is exposed to blue light, electrons are emitted. If the intensity of the blue light is increased (so the light is just brighter), what value will also increase?
A. the maximum kinetic energy of the ejected electrons
B. the number of electrons ejected per second
C. the time lag between the onset of the absorption of light and the ejection of electrons

please help!!!

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Gia Bảo 5 years 2021-07-24T22:37:15+00:00 1 Answers 90 views 0

Answers ( )

  1. minhkhang
    0
    2021-07-24T22:38:41+00:00
    Reply

    So, we know that this question is about photoelectric effect.

    What is photoelectric effect?

    -Photoelectric effect is a phenomenon where electrons are released from a material whenever an electromagnetic radiation such as light, hits it.

    -This phenomenon is first discovered by Heinrich Rudolf Hertz in 1887 whereas Albert Einstein, in 1905, resolved the conflict between the photoelectric effect and Maxwell’s electromagnetic wave theory of light.

    Now to your question, the intensity of light only determines the number of the electrons released, not their maximum kinetic energy because this are proportional to the light’s frequency.

    Also, there is no time lag detected between the entry of radiation and the emission of electrons in experiments held.

    So, with letter A and C out, we can therefore conclude that the answer for this is Letter B

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